In physics, symmetry includes all features of a physical system that exhibit the property of symmetry—that is, under certain transformations, aspects of these systems are "unchanged", according to a particular observation. A symmetry of a physical system is a physical or mathematical feature of the system (observed or intrinsic) that is "preserved" under some change.

A family of particular transformations may be continuous (such as rotation of a circle) or discrete (e.g., reflection
of a bilaterally symmetric figure, or rotation of a regular polygon).
Continuous and discrete transformations give rise to corresponding types
of symmetries. Continuous symmetries can be described by Lie groups while discrete symmetries are described by finite groups (see Symmetry group). Symmetries are frequently amenable to mathematical formulations such as group representations and can be exploited to simplify many problems.

An important example of such symmetry is the invariance of the form of physical laws under arbitrary differentiable coordinate transformations.

There is no direct evidence for the existence of supersymmetry. It is motivated by possible solutions to several theoretical problems. Since the superpartners of the Standard Model particles have not been observed, supersymmetry must be a broken symmetry if it is a true symmetry of nature. This would allow the superparticles to be heavier than the corresponding Standard Model particles.

If supersymmetry exists close to the TeV energy scale, it allows for a solution of the hierarchy problem of the Standard Model, i.e., the fact that the Higgs boson mass is subject to quantum corrections which — barring extremely fine-tuned
cancellations among independent contributions — would make it so large
as to undermine the internal consistency of the theory.

In
supersymmetric theories, on the other hand, the contributions to the
quantum corrections coming from Standard Model are naturally canceled by
the contributions of the corresponding superpartners. Other attractive
features of TeV-scale supersymmetry are the fact that it allows for the
high-energy unification of the weak interactions, the strong interactions and electromagnetism, and the fact that it provides a candidate for dark matter and a natural mechanism for electroweak symmetry breaking.
Therefore, scenarios where supersymmetric partners appear with masses
not much greater than 1 TeV are considered the most well-motivated by
theorists.

These scenarios would imply that experimental traces of the
superpartners should begin to emerge in high-energy collisions at the LHC relatively soon. As of September 2011, no meaningful signs of the superpartners have been observed,which is beginning to significantly constrain the most popular
incarnations of supersymmetry. However, the total parameter space of
consistent supersymmetric extensions of the Standard Model is extremely
diverse and can not be definitively ruled out at the LHC.

Another theoretically appealing property of supersymmetry is that it offers the only "loophole" to the Coleman–Mandula theorem, which prohibits spacetime and internal symmetries from being combined in any nontrivial way, for quantum field theories like the Standard Model under very general assumptions. The Haag-Lopuszanski-Sohnius theorem demonstrates that supersymmetry is the only way spacetime and internal symmetries can be consistently combined.

In general, supersymmetric quantum field theory
is often much easier to work with, as many more problems become exactly
solvable. Supersymmetry is also a feature of most versions of string theory, though it may exist in nature even if string theories are not experimentally detected.

Who am I

Indonesia

Mesin Pencari

NASA (National Aeronautics and Space Administration)

NASA's motto is: "For the benefit of all".

Inspirations Words

Crescat scientia; Vita Excolatur:
"Let knowledge grow from more to more; and so be human life enriched"

"Leadership
is not magnetic personality that can just as well be a glib tongue. It
is not making friends and influencing people that is flattery.
Leadership is lifting a person's vision to higher sights, the raising
of a person's performance to a higher standard, the building of a
personality beyond its normal limitations." ~Anonymous~